EP1520432A1 - Determination de la cause d'une performance insuffisante dans un reseau de communication - Google Patents

Determination de la cause d'une performance insuffisante dans un reseau de communication

Info

Publication number
EP1520432A1
EP1520432A1 EP03763592A EP03763592A EP1520432A1 EP 1520432 A1 EP1520432 A1 EP 1520432A1 EP 03763592 A EP03763592 A EP 03763592A EP 03763592 A EP03763592 A EP 03763592A EP 1520432 A1 EP1520432 A1 EP 1520432A1
Authority
EP
European Patent Office
Prior art keywords
service
network
network elements
underperformance
quality
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03763592A
Other languages
German (de)
English (en)
Inventor
Helmut SCHÖNBAUER
Josef Schwagmann
Helmut Wrubel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Solutions and Networks GmbH and Co KG
Original Assignee
Siemens AG
Nokia Siemens Networks GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Nokia Siemens Networks GmbH and Co KG filed Critical Siemens AG
Publication of EP1520432A1 publication Critical patent/EP1520432A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0677—Localisation of faults
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5003—Managing SLA; Interaction between SLA and QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5003—Managing SLA; Interaction between SLA and QoS
    • H04L41/5009—Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]
    • H04L41/5012—Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF] determining service availability, e.g. which services are available at a certain point in time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5032—Generating service level reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/091—Measuring contribution of individual network components to actual service level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0062—Provisions for network management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5003—Managing SLA; Interaction between SLA and QoS
    • H04L41/5009—Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]
    • H04L41/5012—Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF] determining service availability, e.g. which services are available at a certain point in time
    • H04L41/5016—Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF] determining service availability, e.g. which services are available at a certain point in time based on statistics of service availability, e.g. in percentage or over a given time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability

Definitions

  • the present invention relates to a method for identifying a cause of a service underperformance in a communication network, a communication network control and monitoring system and a control program for a quality of service and / or a fault monitoring device.
  • Network operators offer numerous services to customers in the telecommunications market, in particular Internet services. Services offered by network operators are broken down into different levels of service to meet customer needs for guaranteed levels of service and to stand out from the competition. For example, services are offered at low costs for private customers and services with an extended scope at higher costs for business customers. The expanded scope of services consists, for example, of ensuring high availability and low data loss.
  • service level agreements SLA
  • Proof of compliance with the service level agreement towards the customer is of particular importance. For such proof, services must be monitored, for example, to register failures and to determine the availability of a service. Measurements are also taken to capture quality of service parameters such as data loss.
  • the provision of services is therefore not limited to the pure administration of service parameters, such as bandwidth or telephone number, but also service-specific additional functions are controlled.
  • service parameters such as bandwidth or telephone number
  • service-specific additional functions are controlled.
  • a reliable and quick detection of service shortfalls is essential.
  • the object of the present invention is to create an efficient and reliable method for identifying a cause of an under-performance of the service, and to specify a suitable implementation of the method and a communication network control and monitoring system suitable for carrying out the method.
  • An essential prerequisite for an efficient and reliable detection of a cause of a service underperformance is that according to the invention, services which are affected by a service underperformance are first determined on the basis of a check of the quality or availability of the service performed for selected services.
  • the checking of quality of service or availability can be adapted to the requirements that users of a communication network place on services used. As a result, test results are largely representative of the quality of service or availability perceived by the users.
  • network elements which are relevant for the provision of these services in accordance with information stored in a network element database can be checked selectively for determining the cause. This has the advantage that it is not essentially continuous initially all network elements must be checked in order to use them to derive statements about potentially endangered or disturbed services. Overall, the present invention therefore results in a significantly reduced outlay for reliable monitoring of network elements.
  • FIG. 1 shows a schematic representation of a communication network control and monitoring system
  • FIG. 2 shows a flowchart for a method for determining a cause of a service underperformance in a communication network.
  • the communication network control and monitoring system shown schematically in FIG. 1 comprises a service provision device 101, a communication connection management device 102, an error monitoring device 104 and a quality of service monitoring device 105.
  • the service provision device 101 is provided for setting up or changing services.
  • the service provision device 101 receives messages 121 with service orders and converts these into messages 122 with connection orders, which are transmitted to the communication connection management device 102.
  • the communication connection management device 102 is provided for storing information which describes network elements relevant to the provision of a service in terms of their functional properties and in their topological arrangement. This information is assigned to the respective service and stored in a network element database 103 assigned to the communication connection management device 102.
  • the network elements relevant for the provision of a service include, for example, network Access points, ports, and line connections along an end-to-end network path between two service access points. Functional properties of network elements include bandwidth, supported communication protocols and switching technologies used.
  • the description of the topological arrangement of network elements includes a subdivision of the network elements in the node network elements, such as measuring points and switching points, and edge network elements, such as line connections, and a preparation as topological information in accordance with a node-edge model.
  • the information stored in the network element database 103 is made available to the error monitoring device 104 and the quality of service monitoring device 105 so that it can be called up.
  • the service provider 101 transmits a message to the error monitoring device 104 with an order to monitor the availability of network elements which are specified as relevant for the provision of the respective service.
  • a message 125 with an order for monitoring the quality of service is transmitted to the quality of service monitoring device 105.
  • These monitoring jobs cause error monitoring device 104 and quality of service monitoring device 105 to transmit error messages 127 and measured values 128 recorded in subnetworks 106, 107, 108, which are forwarded to error monitoring device 104 and / or service quality monitoring device 105 via a network operating system 109, 110, 111 assigned to the respective subnetwork to compare with the information stored in the network element database 103 for impermissible deviations.
  • corresponding network element database information is queried by the error monitoring device 104 or the quality of service monitoring device 105 and transmitted to the latter as messages 126.
  • quality monitoring device by the error monitoring device 104 and service 105 a message 129,130 by a reduction in service capacity, indicating the affected diene ⁇ tes generated.
  • the availability and the quality of service are monitored in accordance with a quality of service agreement made between a customer and a network operator. Therefore, only information relating to the network elements specified as relevant by a service level agreement for the provision of a service is stored in the network element database 103. In addition, error messages or measured values are only recorded for the network elements specified as relevant by the service level agreement for the provision of the service.
  • a message 123 with an order for monitoring a quality of service agreement is transmitted from the service provision device 101 to the error monitoring device 104 when a service is set up or changed. This means that a recording of error messages or measured values for network elements specified as relevant by the service level agreement for the provision of a service is already initiated by the establishment or change of the corresponding service.
  • the quality of service monitoring device 105 If the evaluation of a measured value 128 in the quality of service monitoring device 105 reveals that a network element is operated outside an admissible operating range, the quality of service monitoring device 105 sends an alarm message 129 about a violation of a quality of service criterion to the
  • Fault monitoring device 104 is transmitted and converted there into an alarm message 130 about a violation of a quality of service agreement.
  • An error message 127 is converted in the error monitoring device 104 directly into an alarm message about the violation of a service level agreement.
  • the alarm message 130 contains a statement about the availability of the service or the quality of service and becomes a service reduction. elimination of errors to a network operating system 109, 110, 111, which is assigned to the subnet 106, 107, 108, in which an error or a violation of the quality of service criterion occurs.
  • the respective network operating system 109, 110, 111 converts the alarm message 130 into a control command 131, which is transmitted as a message for the elimination of underperformance to a selected control device, not explicitly shown, in the respective subnetwork 106, 107, 108.
  • the network element affected by the elimination of low-performance services is reconfigured by the respective network operating system 109, 110, 111 with access to the information stored in the network elements database 103. This also applies to the configuration of a network element when a service is set up, changed or deleted.
  • the alarm message 130 about a violation of a quality of service agreement is also transmitted to the service provision device 101. There it is processed with customer data and converted into a report 132 about compliance with or violation of a service level agreement.
  • the present invention combines approaches which are directed to monitoring network elements or network resources on the physical level on the one hand and to monitoring quality of service and availability at the application level on the other hand.
  • Approaches aimed at pure monitoring at the physical level reach their limits, particularly in extensive, complex networks, since in such cases a large number of network elements and network resources have to be monitored.
  • a central network resource fails, there is a problem in that this failure triggers a large number of subsequent alarm messages. This means that in such critical situations, an enormous amount of information has to be processed under time-critical conditions.
  • a first approach to dealing with this problem is to filter out secondary alarm messages.
  • the provision 201 of information about the network and service topology represents the starting point of the method according to the invention for determining a cause of a reduced service in a communication network, the sequence of which is illustrated using the flowchart shown in Figure 2.
  • network elements relevant to the provision of a service are described in their functional properties and in their topological arrangement, and the associated descriptive information is stored in the network element database 103 and assigned to the respective service.
  • This is followed by a definition 202 for checking the services provided and a definition 203 for a schedule for checking the selected services with regard to service availability or quality of service. After the services and schedule have been defined, the service availability or quality of service is checked 204 at the specified times and for the selected services.
  • An evaluation 205 of check results is then carried out, and on the basis of these check results, disrupted or endangered services are determined which are either directly or potentially affected by an under-performance of the service.
  • a determination 206 of network elements to be checked is carried out on the basis of the information about the network and service topology stored in the network element database 103.
  • the determined network elements to be checked are those network elements which are identified in the network element database 103 as relevant for the provision of the service affected by the reduced service. This is followed by carrying out 207 a check of the determined network elements with a final evaluation 208 of the check results and a determination of network elements which are the cause of the service underperformance.
  • the check 204 of the selected services with regard to service availability or quality of service is carried out on the basis of a comparison with the information stored in the network element database 103.
  • the information stored in the network element database describes the permissible operating ranges of the network elements.
  • the check 207 is also carried out determined network elements for determining a cause of the service underperformance on the basis of this information.
  • the determined network elements are checked to determine the cause of a service underperformance, for example by detecting status or error messages for the respective network elements. These messages can be monitored actively or passively by the error monitoring device 104 or the quality of service monitoring device 105. Furthermore, such monitoring can also extend to data processing devices not explicitly shown in FIG. 1, which are connected to the communication network shown in FIG. 1, and to operating system or application programs running on these data processing devices.
  • control sequences which can be specified by the error monitoring device 104 or the quality of service monitoring device 105 are provided for execution at or from selected service access points in the subnets 106.107, 108.
  • a virtual user is set up at the respective service access point, whose behavior is mapped by the service access requests summarized in the control sequence.
  • Such a virtual user can appear both as a message source and as a message sink. Since a virtual user can be controlled essentially completely by the error monitoring device 104 or the service quality monitoring device 105, it can in principle be placed at any service access points, for example in the vicinity of service access points of real users or at interfaces between subnetworks.
  • the following scenarios can be emulated, for example, by the control sequences which contain the predefinable service access requests: - "Internet access" - query one or more reference Internet pages,
  • TCP Transmission Control Protocol
  • DHCP Dynamic Host Configuration Protocol
  • UDP User Datagram Protocol
  • network elements that are essential for the provision of a selected service can be checked for operability at predeterminable times, without this requiring a prior check of the service with regard to quality of service or service availability.
  • This offers the advantage that particularly critical network resources can be checked directly even without any indications of service underperformance.
  • end devices can also be included, the check of which is determined at selected times by a service level agreement between a customer and a network operator. This means that a check of network elements or network resources can relate not only to network elements or network resources owned by the network operator, but also to customer-specific end devices.
  • the above-described method for recognizing a service underperformance can also be used to determine faults in power supply units which, from the network operator's point of view, do not belong to one's own network but to an external network and which cannot be directly controlled from the network operator's perspective.
  • the implementation of the method steps carried out in the service provision device 101, the communication connection management device 102, the error monitoring device 104 and the service quality monitoring device 105 takes place in each case by a control program provided for the service provision device 101, the communication connection management device 102, the error monitoring device 104 and the service quality monitoring device 105.
  • the respective control program runs on a data processing system assigned to the service provision device 101, the communication connection management device 102, the error monitoring device 104 or the quality of service monitoring device 105.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne la détermination de la cause d'une performance insuffisante dans un réseau de communication. A cet effet, des informations décrivant les éléments réseau pertinents pour la fourniture d'un service, en termes de propriétés fonctionnelles et de conception topologique, sont mémorisées dans une base de données d'éléments réseau et sont affectées au service. En outre, la disponibilité du et/ou la qualité d'un service sélectionné sont vérifiées à des moments prédéterminés. A l'appui du résultat de vérification, on détermine le service concerné par l'insuffisance de performance. A l'appui des informations mémorisées dans la base de données, on détermine les éléments réseau pertinents pour la fourniture du service concerné par l'insuffisance de performance. Les éléments réseau ainsi déterminés sont vérifiés pour définir la cause de la performance insuffisante.
EP03763592A 2002-07-10 2003-07-08 Determination de la cause d'une performance insuffisante dans un reseau de communication Withdrawn EP1520432A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10231149 2002-07-10
DE10231149 2002-07-10
PCT/DE2003/002278 WO2004008783A1 (fr) 2002-07-10 2003-07-08 Determination de la cause d'une performance insuffisante dans un reseau de communication

Publications (1)

Publication Number Publication Date
EP1520432A1 true EP1520432A1 (fr) 2005-04-06

Family

ID=30009878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03763592A Withdrawn EP1520432A1 (fr) 2002-07-10 2003-07-08 Determination de la cause d'une performance insuffisante dans un reseau de communication

Country Status (3)

Country Link
EP (1) EP1520432A1 (fr)
CN (1) CN1666536A (fr)
WO (1) WO2004008783A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2431067B (en) 2005-10-07 2008-05-07 Cramer Systems Ltd Telecommunications service management
GB2432992B (en) 2005-11-18 2008-09-10 Cramer Systems Ltd Network planning
GB2433675B (en) 2005-12-22 2008-05-07 Cramer Systems Ltd Communications circuit design
GB2435362B (en) 2006-02-20 2008-11-26 Cramer Systems Ltd Method of configuring devices in a telecommunications network
EP2700196B1 (fr) * 2011-04-18 2015-01-28 Telefonaktiebolaget LM Ericsson (PUBL) Procédé et appareil de supervision de qualité de service d'un réseau de communication
CN104584483B (zh) * 2012-07-04 2018-05-08 瑞典爱立信有限公司 用于自动确定服务质量降级的原因的方法和设备

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5893905A (en) * 1996-12-24 1999-04-13 Mci Communications Corporation Automated SLA performance analysis monitor with impact alerts on downstream jobs
EP1190342A2 (fr) * 1999-05-24 2002-03-27 Aprisma Management Technologies, Inc. Gestion de niveau de service
WO2002006972A1 (fr) * 2000-07-13 2002-01-24 Aprisma Management Technologies, Inc. Procede et dispositif pour surveiller et maintenir une qualite de service percue par un utilisateur dans un reseau de communication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004008783A1 *

Also Published As

Publication number Publication date
CN1666536A (zh) 2005-09-07
WO2004008783A1 (fr) 2004-01-22

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